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Monolithic Power Systems Inc. MPQ3425DL-LF-Z
- Part No.:
- MPQ3425DL-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 14-VFDFN Exposed Pad
- Datasheet:
-
MPQ3425DL-LF-Z.pdf
- Description:
- IC REG BOOST ADJ 3A 14QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,974
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Product details
Overview
MPQ3425DL-LF-Z from Monolithic Power Systems is a current-mode, AEC-Q100 Grade 1 qualified boost converter IC with integrated 3.5A/90mΩ MOSFET, 3.1V–22V BIAS input range, programmable 300kHz–1MHz switching frequency, and 55V maximum output voltage. It delivers fast transient response in automotive pre-boost and microphone bias applications.
For engineers reviewing the MPQ3425DL-LF-Z datasheet, MPQ3425DL-LF-Z pinout, MPQ3425DL-LF-Z application, or MPQ3425DL-LF-Z equivalent, key selection criteria include UVLO programmability, soft-start capacitor control, external compensation flexibility, thermal shutdown at 160°C, and QFN-14 (3mm×4mm) package compatibility with high-power-density PCB layouts.
Technical Context
The MPQ3425 employs constant-frequency peak-current-mode control with an internal transconductance error amplifier (160μA/V gain, 300V/V voltage gain) and 1.225V feedback reference. Its COMP pin enables full loop compensation via external R-C networks to stabilize against right-half-plane zero effects in boost topologies.
Switching frequency is set linearly by FSET pin current (regulated to 0.5V), supporting precise noise filtering; EN pin provides dual-function control-on/off enable and VIN UVLO hysteresis programming via 4μA current sink-while SS pin implements 5μA-controlled soft-start with frequency foldback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | Up to 55V - supports wide-range bias generation for automotive sensors and RF tuners. |
| Input BIAS Voltage | 3.1V to 22V - powers IC independently of VIN, enabling operation during cold-crank conditions. |
| Switching Frequency | 300kHz to 1MHz - selectable via FSET resistor for EMI optimization and small-filter design. |
| Internal MOSFET | 3.5A/90mΩ - reduces external component count and conduction losses in space-constrained designs. |
| Feedback Reference | 1.225V ±25mV - enables accurate output regulation with standard resistor-divider networks. |
| Soft-Start Current | 5μA - allows precise ramp time control using external capacitor (e.g., 100nF → ~42ms start-up). |
| Thermal Shutdown | 160°C - protects device under overload or poor heatsinking without latch-off. |
| Quiescent Current | 650–950μA - ensures low standby power in always-on automotive modules. |
Pinout & Package
MPQ3425DL-LF-Z uses a thermally enhanced QFN-14 (3mm × 4mm) package with exposed pad connected to PGND for optimal thermal dissipation (θJC = 12°C/W). The exposed pad must be soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 COMP | Error amplifier output | Connects external R-C network to set loop poles/zeros; critical for stability with ceramic output capacitors. |
| 2 EN | Enable / UVLO control | Pull high ≥1.45V to enable; also programs UVLO hysteresis via external resistor divider and 4μA sink. |
| 3 BIAS | LDO supply input | Accepts 3.1–22V independent supply; must be locally bypassed with ≥1μF ceramic capacitor. |
| 4,5,6 SW | Power switch drain | Three paralleled pins reduce trace inductance and power loss; connect directly to inductor and diode anode. |
| 7 VDD | Gate driver supply | Provides regulated 6V output for internal MOSFET gate drive; decouple with 10nF capacitor. |
| 8,9,10,EP | PGND | Power ground return path; exposed pad is primary thermal and electrical GND connection point. |
| 11 AGND | Analog ground | Reference for FB, COMP, SS; tie to PGND only at single point near exposed pad to avoid noise coupling. |
| 12 SS | Soft-start timing | 5μA current charges external capacitor; controls VCOMP ramp and frequency foldback (250mV → ¼ fSW). |
| 13 FB | Feedback input | Senses output via resistor divider; 1.225V reference enables precise output setting (e.g., 15V with 113k/10k). |
| 14 FSET | Frequency programming | Current out regulated to 0.5V; 84.5kΩ sets 550kHz (typical); supports tight EMI band placement. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable UVLO hysteresis | Configurable via EN pin resistor divider and 4μA internal sink - eliminates brown-out oscillation in 12V automotive systems. |
| Micropower shutdown | <1μA supply current - enables ultra-low-power sleep mode in telematics and ADAS always-on subsystems. |
| External loop compensation | COMP pin supports full Type II/III compensation - allows stable operation with low-ESR ceramic output caps down to 4.7μF. |
| AEC-Q100 Grade 1 qualification | Rated for −40°C to +125°C junction temperature - validated for engine bay and front-end electronics mounting locations. |
| Fast transient response | Peak-current-mode architecture with 100ns minimum on-time - maintains regulation during 2.5A/μs load steps in camera power rails. |
Applications
| Automotive Pre-Boost Supply | RF Tuner Bias Generator |
|---|---|
|
Use Scenario: Boosting 5V–12V battery rail to 24V–48V for radar module power conditioning in ADAS ECUs. IC Role / Device Role / Timing Role: Primary DC-DC step-up regulator with programmable fSW to avoid AM/FM band interference. Use Value: Integrated 3.5A MOSFET and 55V rating eliminate need for external high-voltage switch, reducing BOM count by 3 components. |
Use Scenario: Generating stable 28V bias for automotive satellite radio tuners requiring low-noise, ripple-free supply. IC Role / Device Role / Timing Role: Low-ripple boost converter operating at 600kHz to minimize conducted EMI into sensitive RF front-end. Use Value: Programmable soft-start (via SS pin) prevents inrush-induced voltage sag on shared 12V domain during tuner power-up. |
| Microphone Phantom Power | Industrial Sensor Excitation |
|
Use Scenario: Providing 48V phantom power to MEMS microphones in infotainment head units with strict EMC limits. IC Role / Device Role / Timing Role: Compact, low-profile boost controller with QFN-14 package enabling integration near audio codec ICs. Use Value: 90mΩ RDS(ON) MOSFET and 1MHz max fSW allow use of 4.7μF ceramic output cap - cuts output ripple to <15mVpp. |
Use Scenario: Exciting 100Ω–1kΩ resistive bridge sensors (e.g., pressure, temperature) requiring stable 15V–30V excitation. IC Role / Device Role / Timing Role: Precision-regulated boost source with 1.225V FB reference and <±1% line/load regulation. Use Value: External compensation (COMP pin) enables tuning for varying sensor cable capacitance up to 100nF without instability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 5.5A switch, fixed 500kHz fSW, no FSET or UVLO hysteresis programming. | Lacks AEC-Q100 qualification; rated only to 85°C ambient - unsuitable for under-hood deployment. | Choose when higher output current (≥4A) is needed and automotive qualification is not required. |
| LM5122MMX/NOPB | External MOSFET driver, wider 3V–75V input, but requires 2 extra FETs and gate drivers. | Supports SEPIC/Cuk topologies; better for wide-input industrial supplies, not optimized for compact automotive modules. | Choose when input voltage may exceed 55V or topology flexibility (e.g., buck-boost) is mandatory. |
Compared with TPS61088RHLR and LM5122MMX/NOPB, MPQ3425DL-LF-Z uniquely combines AEC-Q100 Grade 1 qualification, integrated 3.5A switch, programmable fSW/UVLO/soft-start, and QFN-14 footprint - making it the only drop-in solution for space- and reliability-constrained automotive pre-boost designs.
Availability
MPQ3425DL-LF-Z is available at Aetrix Electronics and suitable for automotive ADAS modules, RF tuner power supplies, microphone bias circuits, and industrial sensor excitation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MPQ3425DL-LF-Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, with over two decades of expertise in DC-DC conversion, motor drivers, and LED lighting controllers.
The MPQ3425 belongs to MPS's automotive-grade boost converter product line, designed specifically for reliable, low-EMI voltage boosting in safety-critical vehicle subsystems including infotainment, telematics, and ADAS sensor power domains.
FAQ
What is the minimum input voltage required for MPQ3425DL-LF-Z to start switching?
The device requires a minimum BIAS supply of 3.1V to operate; however, startup from VIN alone depends on EN pin configuration. With EN tied to VIN through a 100kΩ pull-up, automatic startup occurs when VIN exceeds 6V - below that, BIAS must be supplied externally to initiate regulation.
Can MPQ3425DL-LF-Z be used in SEPIC topology?
Yes - the MPQ3425 supports SEPIC operation per its datasheet typical applications. Its current-mode control, 55V SW rating, and ability to regulate with duty cycles >50% make it suitable for SEPIC configurations where input voltage may exceed output voltage, provided layout accounts for coupled inductor grounding and noise isolation.
How is switching frequency accuracy affected by temperature and supply variation?
Over −40°C to +125°C and 3.1V–22V BIAS, fSW variation is ±15% (typical) due to FSET current reference drift. At 25°C and 5V BIAS, tolerance is ±10%. For critical timing applications, verify actual frequency with oscilloscope measurement at FSET node or SW waveform.
What is the recommended layout practice for the exposed thermal pad?
The exposed pad (pins 8,9,10 + EP) must be soldered to a solid copper thermal pad on the PCB, connected to PGND with ≥4 thermal vias (0.3mm diameter) placed within 2mm of pad edges. Avoid splitting the pad or routing signals underneath - this ensures θJA ≤50°C/W and prevents thermal shutdown under 2.5W dissipation.
Does MPQ3425DL-LF-Z support synchronization to an external clock?
No - the MPQ3425 does not support external clock synchronization. Switching frequency is solely determined by the resistor connected between FSET and AGND. For synchronized multi-rail systems, consider MPS's MPQ4333 or alternative controllers with SYNC pin functionality.
What failure protections are implemented beyond thermal shutdown?
In addition to thermal shutdown at 160°C, the MPQ3425 includes under-voltage lockout (UVLO) with programmable hysteresis, cycle-by-cycle current limiting (3.5A typical limit), and soft-start controlled inrush current limiting. There is no hiccup-mode or auto-retry - current limit triggers immediate foldback until fault clears.
Is the 1.225V feedback reference trimmed at production?
Yes - the 1.225V reference is factory-trimmed and specified over temperature (1.19V to 1.26V from −40°C to +125°C). This enables ±1% output voltage accuracy with 0.5% feedback resistors, eliminating need for post-production calibration in automotive grade applications.
MPQ3425DL-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.1V
- Voltage - Input (Max):
- 22V
- Voltage - Output (Min/Fixed):
- 3.1V
- Voltage - Output (Max):
- 55V
- Current - Output:
- 3A
- Frequency - Switching:
- 300kHz ~ 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (3x4)
MPQ3425DL-LF-Z FAQ
1.How can I place an order for MPQ3425DL-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ3425DL-LF-Z on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MPQ3425DL-LF-Z reliable?
The price and inventory of MPQ3425DL-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ3425DL-LF-Z is usually 5 days.
3.What payment methods are accepted for MPQ3425DL-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ3425DL-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ3425DL-LF-Z?
MPQ3425DL-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ3425DL-LF-Z order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MPQ3425DL-LF-Z?
For technical support, including MPQ3425DL-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ3425DL-LF-Z requirements.
6.How does Aetrix verify that MPQ3425DL-LF-Z is sourced from the original manufacturer or authorized distributors?
All MPQ3425DL-LF-Z products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MPQ3425DL-LF-Z meets industry standards.
7.What is the process for return or replacement of MPQ3425DL-LF-Z?
All MPQ3425DL-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ3425DL-LF-Z, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MPQ3425DL-LF-Z part is unused and in its original packaging.
Return procedure for MPQ3425DL-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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